文献类型：期刊文献

英文题名：Construction of Aligned Carbon Nanotube/Benzoxazine Composite Films with High Mechanical Properties and Heat Resistance

作者：Zhu, Yiming[1]; Shi, Hong Liang[2]; Ai, Jin Jin[2]; Liu, Xiaoyun[1]; Wang, Jian Nong[2]

机构：[1] School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China; [2] School of Mechanical and Power Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China

年份：2024

外文期刊名：SSRN

收录：EI(收录号：20240236734)

语种：英文

外文关键词：Carbon films - Carbon nanotubes - Epoxy resins - Glass transition - Military applications - Nanocomposite films - Specific heat - Tensile strength

摘要：Carbon nanotubes (CNTs) are considered as promising nanofiber reinforcing materials for resin-based composites own to their excellent mechanical properties. However, uneven distribution and poor alignment of CNTs hinder the improvement of mechanical properties of CNT composites. At the same time, conventional epoxy resin based composites face the challenge of being unable to be stably used in high-temperature environments. Herein, CNT/Benzoxazine composite films with high mechanical properties and heat resistance are prepared using continuous CNT fibers as reinforcement and Benzoxazine as resin matrix. By optimizing the resin content and CNT alignment for better densification and inter-bonding, the well-designed composite films exhibit a tensile strength of 2.62 GPa, elongation at break of 4.2% and Young’s modulus of 68 GPa. Moreover, benefiting from the coupling effect between CNTs and the highly heat-resistant Benzoxazine resin, the composite films have a high glass transition temperature of 240 °C and are able to achieve 90.6% strength retention at 200 °C for 10 h. Thus, this study provides a novel approach for the development of CNT/resin composites with the characteristics of lightweight, high strength and high strength retention at elevated temperature for the applications such as aerospace, automotive components and other military and civil applications. ? 2024, The Authors. All rights reserved.